Illumination fixture and louvers therefor



Aug. 4, 1953 D. J. BILLER 2,647,985

ILLUMINATION FIXTURE AND LOUVERS.THEREFOR Filed Dec. 24, 1947 2 Sheets-Sheet l HIS ATTORNEYYS.

gmipym razl D. J. BILLER Aug. 4, 1953 IXTURE AND LOUVERS THEREFOR ILLUMINATION F Filed D80. 24, 1947 2 Sheets-Sheet 2 3M9 Gavel/M HIS ATTORNEYS.

Patented Aug. 4, 1 953 ILLUMINATION FIXTURE AND LOUVERS THEREFOR 7 David J. Biller, St. Loui Brite Lighting, Inc., tion of Missouri s, Mo., assignor to Day- St. Louis, Mo., a corpora- Application December 24, 1947, Serial No. 793,592

3 Claims. (01. zero-51.11)

This invention relates to illumination fixtures and louvers therefor and is more particularly directed to a louver construction to be associated with recessed ceiling fixtures to provide for a better dilfusion of the light emanating from the lamp bulbs installed in the fixture.

One of the objects of this invention is to provide a louver construction for a light fixture which will be strong and rigid and which will provide for a higher degree of difiusion of the light rays that originate in the fixture.

Another object of the invention is to provide a lighting fixture providing for a combination of incandescent and fluorescent light fixtures.

In the drawings:

Fig. 1 is a perspective plan view of a light fixture embodying my invention,

Fig. 2 is a vertical sectional view of a portion of the light fixture taken substantially along the line 22 of Fig. 1,

Fig. 3 shows a bottom plan view of the louver,

Fig. 4 is a vertical sectional view of a portion of the light fixture taken substantially along the line 4-4 of Fig. 1,

Fig. 5 is a detail view of the louver latching mechanism,

Fig. 6 is a perspective view of a modified form of light fixture; and

Fig. 7 is a view taken line 1-1 of Fig. 6.

Referring to the drawings, the numeral I designates generally the housing for a light fixture that is to be installed in a ceiling or other suitable location. Suitable holding means in the substantially along the upper part of the housing are provided for the installation of sources of illumination, such as fiourescent lamp bulbs 2 and incandescent lamp bulbs 3 as well as inverted trough reflectors 4 for the fiourescent bulb and glass reflectors 5 for each incandescent bulb. The use of a glass refiector for bulb 3 prevents interference with the transmission of light rays from the fluorescent bulb when the incandescent bulb is not in use and produces a smooth overall lighting effect.

The upper part of housing I also contains suitable electrical circuits and equipment for the bulbs, all of which is well known in the art.

Figure 3 shows the arrangement of the incandescent bulbs in the fixture. These bulbs are preferably disposed directly above louver openings and are arranged on a square or other pattern and produce a smooth overall lightefiect. The fluorescent bulbs and their reflectors extend all the way across the fixture. The fixture presents a definite clear cut two-color pattern of lightbased upon bulb 3 layouts when all lamps are in operation. This color pattern may be varied by properly choosing the desired combination of incandescent and fiourescent bulbs and the .color thereof, thereby altering the overall color effect.

The louver assembly is indicated at 6 and is mounted in the housing I. This assembly is pivotally supported in housing I by means of a plurality of hinges 1, a part of each hinge being secured to the housing and the other part being secured to the louver 6. The hinge is suitably secured to a reinforced part of the louver to pro videabetter assembly.

The louver 6 comprises a rectangular frame member II in which louver members 9 and H) are installed. Each of these louver members is preferably formed by bending a piece of sheet material intoa U shape so that the legs or walls thereof are connected together by a rounded portion. These U members are then suitably notched, one from the top and the other from the bottom at uniformly spaced intervals to enable them to interfit in a manner well known in egg crate filler constructions to thereby form a plurality of rectangular louver openings. The lines 9' and I0 indicate the base of the notches cut in each louver member. The ends of the members 9 and H] are secured to the walls of the frame member II by tack welding or any other appropriate securing means. Louver 6 is latched in position in housing I by means of a screw 8 threaded into a bracket l secured to housing I, the screw being threaded into a flange formed on louver 6.

The outside surface of each of the U members is preferably provided with a white coating which may be a variety of enamel. The U-shaped louver structural members prevent glare by causing a greater difiusion of light rays The sides and rounded ends of the U members prevent direct rays from striking the work surface by reflecting them back and forth between the louver walls, thereby increasing the diffusing ability of the light fixture.

Figures 6 and 7 show a modified form of light fixture l I provided with a housing [2 organized generally along the lines of housing I in which the customary fluorescent tubes 1 3 and other electrical equipment are assembled. The louver M' consists of two longitudinally extended U-shaped members I5 provided with a rounded lower edge and a plurality of transversely arranged single thickness louver members 6, these members being combined after the manner of egg crate fillers tors for each of said fluorescent bulbs; glassre fiectors for each of said incandescent bulbs, said glass reflectors extending through the reflectors for said fluorescent bulbs; and a louver formed from U-shaped wall sections'and rectangular openings fitted in said housing and so arranged that each of saidincandescent bulbs is disposed 2. A' light fixture comprising a rectangular housing; a plurality of fluorescent bulbs in said housing; a plurality of incandescent bulbs in said housingsaid bulbs being arranged in a rectanguiar pattern in said housing; reflectors for each of said fluorescent bulbs; glass reflectors for each of said incandescent bulbs located to extend through'the reflectors for the fluorescent bulbs; a louver frarne hinged tosaid housing and disposed-bpposite said bulbs; and louvers in said frame formed from U-shaped wall'sections the legs of which are spaced apart and connected by a rounded end that extends downwardly, said louvers being assembled in'said frame so as to form rectangular'louve'ropenings, each of said incandescent "bulbs disposed-directly opposite a louver opening to thereby project a definite light pattern.

3. A light fixture comprising a rectangular provided" 'Wlth directly opposite a louver opening to thereby project a preselected light pattern from" housing; a plurality of fluorescent bulbs in said housing; a plurality of incandescent bulbs in said housing, said bulbs being arranged between adjacent pairs of fluorescent bulbs in said housing; reflectors for each of said fluorescent bulbs; glass reflectors for each of said incandescent bulbs, said glass reflectors extending through the fluorescent reflectors: a louver frame hinged to said housing and disposed opposite said bulbs; and louvers in said frame formed from U-shaped wall sections the legs of which are spaced apart and wardly, said louvers being assembled in said fra e connected by a rounded end that extends dowrg:l

'so as to form'rectangular louver openings, ea of said incandescent bulbs disposed directly opposite a louver opening to thereby project a predetermined light pattern.

DAVID J. BILLER.

References Cited inthe file of this patent UNITED STATES PATENTS Number Name Date 901,294 Hewitt Oct. 13, 1908 1,324,008; DHurn-y Dec. 2, 1919 2,134,491 Sibbert Oct. 25, 1-938 2,250,9 5 4 Hagerty'et a1 July 29, 1941 2,282,445 Alderman et al. May 12, 1942 2,299,256 Schultz Oct. 20, 1942 2,313,131 Elias Mar. 9, 1943 2,337,437 Allen Dec. 21, 1-943 2,358,811 Kloner -Sept. 26, 1944 2,398,624; Decker Apr. 16, 1946 2,429,141 Taylor Oct. 14, 194': 2,565,435 Leinen n; Aug. 21, 1951 FOREIGN PATENTS Number Country Date 446,954 Great Britain May 8, 1936 

